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make(1): document ParseEmptyArg

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This commit is contained in:
rillig 2020-11-10 08:02:35 +00:00
parent 3b86f96722
commit 0a8be44c5f
1 changed files with 5 additions and 2 deletions
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7
usr.bin/make/cond.c
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@ -1,4 +1,4 @@
/* $NetBSD: cond.c,v 1.199 2020/11/10 07:40:30 rillig Exp $ */
/* $NetBSD: cond.c,v 1.200 2020/11/10 08:02:35 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@ -93,7 +93,7 @@
#include "dir.h"
/* "@(#)cond.c 8.2 (Berkeley) 1/2/94" */
MAKE_RCSID("$NetBSD: cond.c,v 1.199 2020/11/10 07:40:30 rillig Exp $");
MAKE_RCSID("$NetBSD: cond.c,v 1.200 2020/11/10 08:02:35 rillig Exp $");
/*
* The parsing of conditional expressions is based on this grammar:
@ -677,6 +677,8 @@ done_lhs:
return t;
}
/* The argument to empty() is a variable name, optionally followed by
* variable modifiers. */
static size_t
ParseEmptyArg(const char **pp, Boolean doEval,
const char *func MAKE_ATTR_UNUSED, char **out_arg)
@ -755,6 +757,7 @@ CondParser_Func(CondParser *par, Boolean doEval, Token *out_token)
*out_token = arglen == 0 ? TOK_FALSE : TOK_ERROR;
return TRUE;
}
/* Evaluate the argument using the required function. */
*out_token = ToToken(!doEval || fn->fn_eval(arglen, arg));
free(arg);